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Beginner Setup - Hostnames rather than IP's

Quite new to having a hardware firewall (running UTM Home edition) - literally second day of having the box on the network after several nightmares with NIC's. 

I've read the instructions on the Sophos website with regard to DNS BP's - and it talks about how to go about setting things up so the hostnames show rather than IP's - https://www.sophos.com/en-us/support/knowledgebase/120283.aspx

 I'm not a complete novice with this kinda stuff - but PTR's - errrrrm

I've set the UTM to be the main router (and DNS - so in the DNS list, it has a Level3 one, a Plusnet one and itself at 192.168.1.1). How would I set it up? I have no AD DNS's or anything like that. How would the PTR work? (Address range is 192.168.1.1-192.168.1.254

Might be a silly question, I am aware

Cheers!



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  • At risk of sounding VERY stupid, I haven't actually got another DHCP server on the network, or any sort of AD running. Previous to the UTM going in, a Netgear router used to handle DHCP. I am assuming that the UTM doesn't come with full internal DHCP features hence needs something like a DHCP server provided by Windows Server or something?

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  • The UTM's DHCP server does indeed do this.  Just fill in 'Domain' with domain.tld.

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • Progress! The UTM is now listing hostnames in reports. Screenshot attached. 

    But, I still cannot get reverse DNS working. At all. Following your DNS Best Practice post but no ball. Screenshots attached. What may be wrong with this setup? (UTM IP address is 192.168.1.1)

  • Disable/delete your two Request Routes and remove the IP of "Internal (Address)" from 'Forwarders' and then try again.  By the way, the 'IPv4 Leases' tab shows the name of the devices.

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • Still not working. Is it worth resetting the UTM and trying again do you think? 

  • What's not working?  Please insert a picture.

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • I'm still unable to access anything on the network internally by hostnames - networked printers are not working unless IP's are used, cannot access SMB shares etc. Tried following the instructions but still no ball. 

    Starting to think it could be an error in the UTM installation possibly so wondering a fresh install might be a good idea? Should functionality such as reaching internal network shares by typing \\[machinename]\[sharename] be working as default? 

  • I'm not a Microsoft guy, but I bet that might work with a domain - maybe with a Workgroup.

    Again, without seeing pictures of actual configurations and error messages, I have difficulty using my intuition to see possible issues.

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA